Gary,
The original channel 13 was at 216 MHz.
The red scale is hard to read so I do not know if it has a channel 1 on it or not.
Channel 1 did exist for a while.
But we know where 48 Mhz went
BTW , the 6J6 tubes are RF dual triodes that have been used in mixers at 600 MHz.
TTFN
John G.
